Calibração de câmara semiaberta estática para quantificação de amônia volatilizada do solo
Calibração de câmara semiaberta estática para quantificação de amônia volatilizada do solo
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单独进行氨挥发定量校准
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
B. Alves
中科院分区：
文献类型：
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作者：
E. D. S. Araújo;Tatiana Marsola;M. Miyazawa;L. Soares;S. Urquiaga;R. M. Boddey;B. Alves
这项工作的目的是校准一个实用的、低成本的土壤氨挥发定量装置。使用15N同位素平衡技术对该试验室进行了校准。挥发氨被用2 L聚对苯二甲酸乙二醇酯塑料瓶建造的半开放式自由静态室捕获。内侧有自由空气循环，一条宽2.5厘米，长25厘米的聚亚安酯泡沫塑料垂直悬挂，下端插入装有酸性溶液的瓶子里，保持泡沫湿润。随着土壤氨挥发速率的增加，小室对15N-氨的回收率呈线性增加。现场试验表明，回收挥发氨的效率为57%。泡沫的采样间隔可以从一天到六天不等，而不会影响系统效率。对于使用所提出的方法的实地研究，应使用1.74%的修正系数来估计土壤中氨挥发的真实速率。
The objective of this work was to calibrate a practical and low-cost chamber for the quantification of ammonia volatilization from soil. The chamber was calibrated using the 15N isotope balance technique. The volatilized ammonia was captured by a semi-opened free static chamber built with a 2 L ethylene polyterephthalate (PET) plastic bottle. The inner side of the chamber had free-air circulation and a stripe of polyurethane foam, with 2.5 cm wide and 25 cm long, hanged vertically with the lower end inserted in a bottle containing acid solution, which kept the foam moistened. The recovery of 15N-ammonia by the chamber increased linearly with the increase in the rate of soil ammonia volatilization. Field tests showed an efficiency of 57% in the volatilized ammonia recuperation. The sampling interval of foam can vary from one to six days without impairing the system efficiency. For studies in the field using the proposed method, a correction factor of 1.74 should be used to estimate the real rate of ammonia volatilization from soil.